| abstract |
An object of the present invention is to provide an optical polylactic acid film which has good dimensional stability during heating and can be suitably used as an optical film, particularly as a polarizing plate protective film, using a polylactic acid film. A crystal melting peak in a specific temperature range, a specific stereogenicity, a retardation in a plane direction (Re) and a retardation in a thickness direction (Rth) are in a specific numerical range, A polylactic acid film having a specific heat shrinkage rate. [Selection figure] None |